Introduction: Tiny Auto-measuring Dist With Mini Part_3

By david
About: As a young kid, my curiosity in electronics was compelling.... why does thunder interrupt the radio reception? ....why does ROBOTs run without any wire?.... and I've been hooked on making thing ever since.

1) easy .

2) simple.

3) 2032 batt.

4) homemade.

5) portable.

Step 1: Material

dcv - displayer module * 1

Li battery (2032) * 2

battery holder * 2

HC - SR04 module * 1

mini * 1

UNO * 1 (for prototype use)

breadboard * 1 (for prototype use)

phone line box * 1

Step 2: Clean It All

Step 3: Fixed the Circuit on the Cover

fixed the SSD DCV - display module and HC-SR04

and mini on the cover with the hot glue gun.

Step 4: Test Circuit With UNO

maybe there are someone wondering about

how does it work:

because the mini have a max current limits.

so i use a dcv-displayer to independent the display

circuits from the mini.

the ping sent out signal... and travel...

and get reception t us later.

the mini convert the t domain to PWM domain.

and the dcv mudule convert PWM domain

to v domain.

and then the distance is on SSD now !

Step 5: Coding

i use the pin 6 (PWM one) to output the dist,

but you could use any pin that support PWM

as you like.

Attachments

Step 6: Finished

the MAX dist is about up to 499 mm !

HAVE FUN !